Furnace-regulator.



0. I'. LAWRENCE.

v FURNAUE REGULATOR.'-

v APPLIGATION IIIYEBD Amma; laos.

954,036, Patented Apr.. 5, 1910.

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UNITED STATES PATENT OFFICE.

ORRIN F. LAWRENCE, OF CANTON, OHIO.

FURNACE-REGULATOR.

To all whom 'it may conccm:

Be it known that I, ORRIN F. LAWRENCE, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented a new and useful Furnace-Regulator, of which the following is aspecification.

Furnaces and other heating apparatus for residences and the like areusually provided with what is termed a draft damper, which is adapted tobe opened for the inlet of air to increase combustion, and also withwhat is known as a check damper, usually located on the smoke pipeleading from the furnace to the flue and designed, when opened, to admitair into the said pipe for the purpose of reducing the amount of draftand thereby checking combustion. Devices for opening the draft and checkdampers of furnaces from a distance, and especially from the floor abovethe furnace are of extreme importance.

My invention relates to an improvement in the construction of suchdevices, the object being to provide a furnace regulator whereby the twodampers may be independently and accurately regulated from a distance ina convenient manner. I attain this object, together with other objectsreadily apparent to those skilled in the art, by the constructionillustrated in the accom panying drawing in which- Figure 1 is anelevation illustrating a furnace regulator embodying my invention andits appropriate connection and arrangement with reference to a furnace.Fig. 2 is a front elevation of the regulator. Fig. 3

is a horizontal section on the line 3 8 of Fig. 2. Fig. 4 is a verticalsection' on the line 4 4 of Fig. 2. Fig. 5 is a detached perspectiveView of one of the indicator Y knobs, one of the sprockets and a portionof the chain adapted to be arranged on said sprocket. Fig. 6 is afragmentary view illustrating a detail of construction and showing themethod of supporting the crosspiece provided with the rear sprocketbearings.

Specification of Letters Patent.

Application mea April 23, 1909.

Patented Apr. 5, 1910.

Serial No. 491,796.

which 4 is a draft damper and 5 is the check damper.

The regulator frame is preferably formed with a front fiat portion 6adapted to lie in a perpendicular plane, and integral rearwardlyextending wall ,flanges 7 adapted to rest against the wall when thedevice is properly arranged as illustrated in Figs. 3 and 4. In thefront portion 6 are arranged appropriate apertures through whichfastening screws 8 may extend into the wall for the purpose ofsupporting the device. In the front 6 are also arranged spaced aperturesat 9, which apertures form the front bearings for the sprocket shafts10. Formed upon the inner sides of the wall flanges 7 are ledges 11,upon and against which the ends of the cross-piece 12 may bear.Intermediate the ends of the cross-piece 12 is a forwardly extending lug13 adapted to engage the back surface of the front 6 for the purpose ofproperly spacing the said front and cross-piece from each other. For thepurpose of maintaining the cross-piece properly in place a bolt 14 orits equivalent extends through the front 6 and through the aperture 15in the cross-piece to clamp the said front and cross-piece together. Inthe crosspiece 11 are arranged apertures 16 forming the rear bearingsfor the sprocket shafts 10.

The portions 17 and 18 of the sprocket shafts are rounded and adapted torotate within the apertures 9 and the apertures 16. From'the portions 18forwardly the shafts 10 are squared and adapted to enter squaredapertures in the indicator knobs. The indicator knobs are preferably ofthe form illustrated in Fig. 5 and comprise a rounded knob portion 19and indicator portion 20, the indicator portion forming a boss aroundthe squared aperture and having a projection terminating in a pointer,21, extending beyond the periphery of the knob portion for the purposewhich will hereinafter more fully appear. Fixedly mounted upon thesprocket shafts are the sprockets 22 each of which consists of a thickdisk or wheel provided upon its periphery with teeth or projectionsadapted to engage the links of a chain, as illustrated in Fig. 5.

- Upon the front surface of the front portion 6 and concentricallyarranged with reference to the spaced apertures at 9 are series ofdepressions forming graduations over which the pointer 21 is adapted tomove when the knobs 19 are rotated. Upon the front surface of theportion G and projecting therefrom at a point between the edge of theindicator portion 20 and the periphery of the knob portion 19 is a lug23 which prevents the further rotation of the knob 19 when theprojection of the portion 20 comes into engagement with said lug, asillustrated in Fig. 4. It will be understood that each of the knobs isprovided with a device of this character and that the purpose is toprevent the accidental turning of the knob in the wrong direction. Thelocation of each luo' 23 is preferably such that when the knob 19 isstopped in its rotation by such lug the pointer 21 will be extendeddirectly downwardly.

1f desired, an arrow or other indicating symbol may be arranged upon theface of the portion G to show the proper direction for turning the knobs19 in opening the dainpers. Some means of differentiating the draft fromthe check knobs may be provided if desired such as the words Draft andCheck as illustrated in Fig. 2. rlhe word Off may also be arranged atthe bottommost point of the annular graduations to indicate that whenthe pointer 21 is directed to such word the corresponding damper of thefurnace is closed.

The chain 211 is connected to the draft damper f1 and runs over theguide pulleys, 25, whence it extends upwardly and over the sprocket 22on the draft side of the regulator, thence downwardly, again through thefloor 2, and is provided with a counter-balancing weight 26. This weight26 is adapted to substantially counter-balance the weight of the draftdamper 4L so that there may be no tendency to a further opening orclosing of the said damper when it has been adjusted according to thedesire of the operator. 1n a similar manner the chain 27 is connected tothe check damper 5, runs over the guide pulleys, 25, and over thesprocket 22 of the check side of the regulator. The weight 28 is adaptedto counter-balance the check damper 5.

1t will be understood that when the pointers 21 are directed downwardlyboth draft and check da-.mpers will be in their closed positions. Itwill then be possible to operate either damper by turning theappropriate knob. Vhen the knob is turned the corresponding sprocketwill be also turned or rotated, thus operating the corresponding chainin the direction desired to open or to close the damper as the case maybe.

It should be noted that the draft and check sides of the regulator areentirely independent of each other in so far as their operation isconcerned and that it is not necessary to open one damper when the otheris closed, as is commonly the practice in constructions heretoforeemployed, ln the operation of the device it should also be noted thatthe pointers, 21, moving overthe annularly arranged graduations on thefront portion 6 will indicate in an accurate manner the amount ofmovement of the corresponding dampers.

It will be seen from the above that the device described and illustratedis well adapted to, accomplish the result desired and that theconstruction is such as to render the cost of manufacture of the deviceextremely small in view of the efficiency, accuracy and the convenienceof the device in use.

I claim:

1. In a device of the character described, a furnace provided with adraft damper and a check damper, a regulator frame provided withbearings, a cross-piece arranged at the back of and spaced from saidregulator frame, said cross-piece provided with bearings correspondingwith the bearings in said regulator frame, sprocket shafts journaled inthe bearings in said frame and cross-piece, indicator knobs comprisingrounded portions and indicator portions, said indicator knobs arrangedon said sprocket shafts, sprockets mounted upon said sprocket shaftsintermediate said indicator frame and said cross-piece, said regulatorframe provided with graduations over which the said indicator portionsof said indicator knobs are adapted to move and chains connected to saiddraft and check dampers respectively, extending over separate sprockets,and provided with separate counter-balancing weights.

2. In a furnace regulator of the class described a regulator framecomprising a front portion adapted to lie in a vertical plane, integralrearwardly extending wall flanges adapted to `rest against the wall,means for connecting the said frame to the wall, said front portionprovided with spaced apertures, a cross-piece extending between saidwall flanges at the rear of said front portion, maintained in spacedrelation with reference to said front portion, and provided withapertures, the spaced apertures in the said front portion and in thesaid crosspiece forming bearings for sprocket shafts, sprocket shaftsjournaled in said bearings, sprockets tixedly mounted upon said sprocketshafts between said front portion and said cross-piece, said sprocketshafts extending forwardly from the front face of the said frontportion, indicator knobs iixedly mounted upon said forward extensions ofsaid shafts, and provided with pointers, said front portion providedwith annular graduations concentrically arranged with reference to saidshafts, said pointers In testimony that I claim the above, I on saidindicator knobs adapted to move have hereunto subscribed my name in theover Said graduntons, separate chains operpresence of two Witnesses.

atvely connected to the draft and t0 the ORRIN F. LAWRENCE. check damperof al furnace and extending Witnesses:

over separate sprockets, and means for coun- LAURA R. KLINE,

terbalancing the Weight of said dampers. W'ILLIAM I-I. MILLER.

